As has been said you can’t simply transfer the files because the installation creates registry entries in order for it to run, etc.

My concerns about the version you had stem from your comment “I am running Avast Home with 2 year updates on my current PC.” I thought you were talking about the registration for free VPS updates as a part of the free license they only last for 14 months. There have been some websites fraudulently selling avast, I was thinking you might have been tricked.

I now understand that you mean you have had that copy for two years and have updated it during that period.

So the advice remains the same download the latest version and re-register for a new free 14 month registration.